Pillar 3: Matter and energy

3.1 Theory (14)
   • Philosophy of physics

3.2 Principles (15)
   • Physics
      •• Philosophy of physics*
      •• Mechanics
      •• Optics
      •• Electricity
      •• Magnetism
      •• Acoustics
      •• Thermodynamics
      •• Quantum mechanics
      •• Atomic physics
      •• Nuclear physics
      •• Particle physics
      •• Condensed matter physics

3.3 Substances (16)
    • Chemistry
      •• Philosophy of chemistry
      •• Organic chemistry
      •• Inorganic chemistry
      •• Physical chemistry
      •• Analytical chemistry
      •• Biochemistry